New Delhi, July 14 -- Are you someone who notices little things like a misplaced book or spelling errors in messages? If yes, this optical illusion is a perfect challenge for your sharp eyes. This difficult and tricky brain teaser optical illusion is going viral on the Internet. People are sharing it on their WhatsApp or Instagram pages to challenge their friends.

The optical illusion has 12 rows and 12 columns with a similar-looking number '8' that fills every cell. They are neatly placed against a soft, bluish-green background that seems like a pattern of identical '8's at first glance. But a single 'B' is hidden in this optical illusion. It is similar to the number 8 except it has a straight line on the left side.

Can you find it wit...